git-xargs not respecting .gitignore

**git-xargs version**
What does `git-xargs --version` show?

`git-xargs version v0.0.11`

**Describe the bug**
`git-xargs` is not respecting `.gitignore`

**To Reproduce**
Steps to reproduce the behavior:

```sh
#!/usr/bin/env bash

git-xargs \
--commit-message "Update Yarn Berry to latest canary" \
--repos ../repos.txt \
--branch-name chore/update-yarn-berry-canary \
--loglevel debug \
"$(pwd)/update-yarn-berry-canary.sh"
```

```
#!/usr/bin/env bash

# update-yarn-berry-canary.sh

yarn set version canary
yarn
```

That results in files being added to `node_modules` when, in my `.gitignore` in those projects, I have `node_modules/` listed.

**Expected behavior**

Respect the `.gitignore` (in this case, `node_modules/`)

**Screenshots**
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**Additional context**
Add any other context about the problem here.